Problems writing to USB flash drive

[Walter]

In my application I want to captured data
Save by Button Click on a USB stick.
Tablet Android 4.2

And I get the following error:
open failed: AEACCES (Permission denied)

When reading files in the USB flash drive I have no problems!

Are there simple and really working example?

 

[DonManfred]

Do you have added the right permission to your manifest?

AddPermission(android.permission.WRITE_EXTERNAL_STORAGE) ' Allows an application to write to external storage.

I dont know from which android version the access to external storage is limited by google... Maybe 4+

In this case you should use

File.DirDefaultExternal

 

[Walter]

Thanks for the information
Error has remained

File.Copy (File.DirRootExternal, "INI.txt", "/ mnt/usbhost1", "INI.txt")

 

[sorex]

that space between / & mnt is that copy/paste thingy?

 

[Walter]

only at our Info
the App it is natural
File.Copy (File.DirRootExternal, "INI.txt", "/mnt/usbhost1", "INI.txt")

Same mistake!

 

[DonManfred]

Most probably you app just dont have the permissions to write to that path. It is limited by Android.

See this answer from Erel to find the right paths you can try.

 

[Walter]

at 4.3 it works
4.2.2 when it does not work
both devices are not rooted

available at 4.2.2 Additional settings?
root manger says setting = r / w